i've looked around and i found only two related designs:
- active electric water condenser.
- solar passive water still (that distill dirty water)
not quite what i was looking for...
closed as off topic by Chris Cudmore, Niall C.♦, Tester101♦ Aug 23 '12 at 20:32
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Finely, i've found this product. the closest i came to... although i would like to find a diy design that generates water for adults trees.